Improvement in metallic packings



UNITED A. STATES PATENT OFFICE.

WILLIAM HARPER, OF NEW HAVEN, CONNECTICUEVASSIGNOR OFONE- HALF'HIS RIGHT TO WILLIAM 'IK PORTER,OF SAME PLACE.

IMPROVEMENT IN METALLIC PACKINGS.

Specification forming part of Letters Patent No. 176,627, dated April 25, 1876; application led February 3, 1876.

To all whom #may-concern Belit known that I, WILLIAM HARPER, of the city and county ot' New Haven, in the State of Connecticut, have invented certain new 'and useful Improvements in -Metallic Packings for the Piston-ltods of Steam -Engines, Pumplods, and other purposes; and l do hereby declare that thc following' is a full, clear, andeXact description of the same, reference being had to the accompanying dra\ving, which forms part ot' this specitication.

Among the various purposes to which this invention is applicable may be mentioned packing the pistonrods of steam-engines and various kinds .of steam, water, and air joints, including slipjoints of pipes, exi-)ansion-joints ot' sectional boilers, the packing of valve-stems, and steam and ordinary plunger pumps, but it will suffice here to describe the invention as applied tothe cylinder-head ot' a steam-en gine,

for packing the piston-rod of the latter.

The improvement will be i'ul'ly hereinafter. described and specifically pointed vout in the claim, a preliminary description being there- V fore deemed unnecessary.

Figure lis a transverse section -ot an eilgine-cylinder cover with my invention applied tothe packing ofthe pistonrod of the engine.

Fig. 2 is a plan ofthe same in part, with a cap or outer plate removed.

A represents the cylinder-cover ot' a steamengine, constructed with a neck, b, whereby said cover is made to forni `the recessed or chambered base-piece, which receives the inetallic packing Within it. vThis packing is composed of an outer ring, B, andI inner ring G, both built up of segments or sections, and arran ged to break j oint one with the other, and the inner ring G being seated Within an inner rabbet, d, made in thebuter ringand of a depth .corresponding with the thickness of the inner ring. D is the 'cap or outer plate, against which the outer end ot the compound ring-` the insertion and removal of the packing, saidcap being ground or'dressed on itsinner surface to make a close joint with the packing.

The packing -rings are radially collapsed and forced out endwise in the following manner:` The base-piece or cylinder-cover A has one or more outer passages or inlets, f,through it, arranged to conduct steam to the back of the outer ring B, to give a collapsing pressure or action to the rings B C, and has in addition one or more inner passages or inlets, g,to conduct steam to the back ot' the outer ring for the purpose of projecting the outer ends ot' the rings B C against the inner surface of the cap D, thus securing a closejoint in every direction, besides securing an automatic adjustment ot' the packing and other advan-.

tages.

I claimlets or passages g f, the chainbered base A, the cap D, the inner rabbeted outer packingring B, and the packing-ring C, arranged Within the rabbet of the outer ring, substan tially as specied.

WILLIAM HARPER.

Witnesses:

C. T. DRIscoLL ADOLPH AsHEE.

The combination of the inner and outer in- A 

